Lake Brownwood is a census-designated place (CDP) located in Brown County in central Texas, United States. The population was 1,532 at the 2010 census.
The Lake Brownwood CDP is located in western Brown County at 31°49′25″N 99°5′41″W (31.823538, -99.094827), along the western arm of Lake Brownwood, a reservoir on Jim Ned Creek and Pecan Bayou. The CDP is 13 miles (21 km) northwest of Brownwood, the county seat.
According to the United States Census Bureau, the CDP has a total area of 6.8 square miles (17.5 km2), of which 5.7 square miles (14.7 km2) are land and 1.1 square miles (2.8 km2), or 15.77%, are covered by water.
As of the census of 2000, 1,694 people, 723 households, and 493 families resided in the CDP. The population density was 295.9 people per square mile (114.3/km2). The 1,043 housing units averaged 182.2 per square mile (70.4/km2). The racial makeup of the CDP was 89.49% White, 1.48% African American, 0.53% Native American, 0.06% Pacific Islander, 6.20% from other races, and 2.24% from two or more races. Hispanics or Latinos of any race were 8.97% of the population.
Of the 723 households, 25.3% had children under the age of 18 living with them, 56.4% were married couples living together, 9.1% had a female householder with no husband present, and 31.7% were not families. About 27.7% of all households were made up of individuals, and 11.3% had someone living alone who was 65 years of age or older. The average household size was 2.34 and the average family size was 2.80.